World Wide Web documents consists of text and pictures and also may include
sound, video, or other files. These documents are accessible by users on
the Internet. The World Wide Web is the set of all these documents that are
accessible by users. A web document can be reached by its address called
the uniform resource locator or URL. Also, within a document, a URL may be
given for a different document located on the same computer or on a computer
somewhere else in the world. This linking address is usually summoned by
bold, color, or underlined text, or even by a picture. You may 'click' this
text or picture and the new document appears. These connections to other
documents are called hypertext links .

You can move to a new document through a link and from a link on that
document to another document, etc. Also, you can move backwards through the
previous documents (and forward, if you have gone backward). These documents
are temporarily stored in a cache on your computer. Of course if there is
a web page you particularly want to return to in the future, you can bookmark
it with one 'click' and your computer records its URL so that you can have
quick access to it in the future.

(Going back to the olden days of the internet, circa 1970, a protocol
(set of communication rules) was developed called the transmission control
protocol / Internet protocol or TCP/IP. The TCP/IP breaks up a document or
file into packets (much like boxes traveling in the mail numbered 1 of n,
2 of n, 3 of n, ,n of n) and the packets are sent by one or more
transmission routes, arriving at a receiving computer which reassembles the
document and requests from the sending computer any missing packets. So if
a packet is lost en-route through one particular geographical location, the
missing packet is simply replaced by a copy through another transmission
path. Communications should remain intact during severe emergencies. It worked.
The Iraqis Internet was viable during most of the Gulf War. When one path
was bombed out, communications continued, automatically through other paths
and lost information was almost immediately restored.)